Spiral conveyer unit



FIG. 1 is a front elevational view of a spiral conveyor unit showing mynew design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is an enlarged top plain view thereof; and,

FIG. 6 is an enlarged bottom plan view thereof.

The broken line showing of a support base in drawing FIG. 1 is forillustrative purposes only and forms no part of the claimed design.

The ornamental design for a spiral conveyer unit, as shown anddescribed.